We want to get right to these details just coming in on the disappearance of Malaysia airlines flight 370. What could be the first big break in the story. These two photos right there, Iranian men traveling on those stolen passports. One from Italy. They were traveling together and now know that one of the men, 19-year-old on the right right there was trying to seek asylum in Germany. Authorities have been speaking with his mom. She was expecting him in Frankfurt. He didn't show up. She called the police. Authorities saying he is not likely a member of any terrorist group. The scramble for clues on what might have happened at a fever pitch. The search expanded to both coasts of Malaysia as that plane could have flown for a very long distance on autopilot, if, if the crew was incapacitated. Our team tracking the story all through the night and Pierre Thomas starts us off with the latest on the investigation. Good morning, Pierre. Reporter: Good morning, George. Finally after days of frustration, a chance to unravel the mystery of those stolen passports. Two of the impostors have been identified as Iranians. For the fir time we see the two men who used stolen passports to board Malaysia airlines flight 370. Here's one caught on surveillance tape at the airport posing an an Austrian. They identified him at a late night press conference. His name, pouria our Mohammed mehrdad. His mother said she knew he was traveling on a passport and trying to emigrate to Germany. We believe he is not likely to be a member of any terrorist group. We have to take this extremely seriously and we have to do every possible type of exhaust -- every type of investigation. Reporter: While other investigators focus on catastrophic mechanical failure or some sort of accident Malaysian police are looking at hijacking, sabotage or psychological problems with the passengers or crew. The surveillance video may help police understand the intentions of the two impostors. Do they talk? Are they acting strange while they're in line or moving along. Reporter: The Malaysian government has given the surveillance footage to the FBI and also fingerprints and photographs of the impostors recovered at the airport. Authorities in Thailand are questioning the owners of these travel agencies which sold the one-way ticks used by the impostors. ABC news has learned they were purchased at the same time by an Iranian man known as Mr. Ali. Some investigators believe that suggests the men coordinated their activities. There's at least 40,000 stolen passports every year. Reporter: So the stolen passports may be about illegal immigration not terrorism. The sources emphasize it's way too early to draw any final conclusions.

This transcript has been automatically generated and may not be 100% accurate.

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